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Spark plug thread inserts

Subject: Spark plug thread inserts
Date: Tue, 23 Sep 2003 14:58:10 EDT
I am in the process of repairing a set of cast iron Ford heads that the spark 
plug threads are stripped.  The original thread is a tapered seat 14 M.M. 
thread.  I can get thread inserts from Time Fasteners to repair the thread to 
stock, but that requires the head be tapped out to 18 M.M.  Would I be better 
just to tap the head for 18 M.M. and use an 18 M.M. gasket type plug.  The 
engine will be using an 871 blower.  

MPH Dave

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